Valley filtering effect of phonons in graphene with a grain boundary
arXiv:1902.07372 · doi:10.1103/PhysRevB.99.064302
Abstract
Due to their possibility to encode information and realize low-energy-consumption quantum devices, control and manipulation of the valley degree of freedom have been widely studied in electronic systems. In contrast, the phononic counterpart--valley phononics--has been largely unexplored, despite the importance in both fundamental science and practical applications. In this work, we demonstrate that the control of "valleys" is also applicable for phonons in graphene by using a grain boundary. In particular, perfect valley filtering effect is observed at certain energy windows for flexural modes and found to be closely related to the anisotropy of phonon valley pockets. Moreover, valley filtering may be further improved using Fano-like resonance. Our findings reveal the possibility of valley phononics, paving the road towards purposeful phonon engineering and future valley phononics.
arXiv comment20 pages, 5 figures
References in corpus (29)
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley filter and valley valve in graphene
- Large-gap quantum spin Hall insulators in tin films
- Thermal diode: Rectification of heat flux
- Electronic transport in polycrystalline graphene
- Graphene valley filter using a line defect
- Giant and tunable valley degeneracy splitting in MoTe2
- Valley susceptibility of an interacting two-dimensional electron system
- Field-induced polarisation of Dirac valleys in bismuth
- Generation of pure bulk valley current in graphene
- Conductance calculations for quantum wires and interfaces: mode matching and Green functions
- Model for Topological Phononics and Phonon Diode
- Pseudospins and topological effects of phonons in a Kekule lattice
- Effect of Grain Boundaries on Thermal Transport in Graphene
- RESCU: a Real Space Electronic Structure Method
- Carbon nanoelectronics: unzipping tubes into graphene ribbons
- Nonequilibrium Green's function method for thermal transport in junctions
- Nonlinear valley and spin currents from Fermi pocket anisotropy in 2D crystals
- Nonequilibrium Green's function method for phonon-phonon interaction and ballistic-diffusive thermal transport
- Thermally driven pure spin and valley current via anomalous Nernst effect in monolayer group-VI dichalcogenides
- Structurally Dependent Fano Resonances in the Infrared Spectra of Phonons in Few-Layer Graphene
- Phonon Eigenspectrum-Based Formulation of the Atomistic Green's Function Method
- A general group theoretical method to unfold band structures and its application
- Valley Seebeck effect in gate tunable zigzag graphene nanoribbons
- Thermal engineering in low-dimensional quantum devices: a tutorial review of nonequilibrium Green's function methods
- Phonon Unfolding: A program for unfolding phonon dispersions of materials
- Transmission spectra and valley processing of graphene and carbon nanotube superlattices with inter-valley coupling
- Single-mode phonon transmission in symmetry broken carbon nanotubes
- Zero Modes on Zero-Angle Grain Boundaries in Graphene
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- Giant tunneling magnetoresistance based on spin-valley-mismatched ferromagnetic metals
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- The Atomistic Green's Function method for acoustic and elastic wave-scattering problems
- Full Counting Statistics of Phonon Transport in Disordered Systems
- Probing divacancy defects in a zigzag graphene nanoribbon through RKKY exchange interaction
- Ultralow radiative heat flux by Anderson localization in quasiperiodic plasmonic chains
- Negative Refraction of Terahertz Phonons via Interfacial Momentum Compensation